Assay devices with integrated sample dilution and dilution verification and methods of using same
First Claim
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1. A method of performing an assay for an analyte in a sample, said method comprising the steps of:
- introducing a sample into a sample chamber of a cartridge, wherein said chamber is located between a sample entry port and a sample isolation unit and includes a diluent introduction port for receiving diluent, and wherein the volume between the diluent introduction port and the sample isolation unit defines a metered volume of said sample for dilution;
transporting a volume of diluent from a diluent conduit to the metered volume of sample, wherein said volume of diluent is combined with said metered volume of sample to form a diluted sample;
transporting said diluted sample to a sensor;
performing an analyte assay at said sensor; and
determining a dilution ratio of the diluted sample.
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Abstract
The invention is to devices and method for rapid determination of analytes in liquid samples by various assays including immunoassays incorporating a sample dilution feature for forming a diluted sample for analysis. The devices and methods also include a dilution verification feature for verifying the degree of dilution of the diluted sample. The devices preferably are capable of being used in the point-of-care diagnostic field is provided.
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20 Claims
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1. A method of performing an assay for an analyte in a sample, said method comprising the steps of:
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introducing a sample into a sample chamber of a cartridge, wherein said chamber is located between a sample entry port and a sample isolation unit and includes a diluent introduction port for receiving diluent, and wherein the volume between the diluent introduction port and the sample isolation unit defines a metered volume of said sample for dilution; transporting a volume of diluent from a diluent conduit to the metered volume of sample, wherein said volume of diluent is combined with said metered volume of sample to form a diluted sample; transporting said diluted sample to a sensor; performing an analyte assay at said sensor; and determining a dilution ratio of the diluted sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification